HP 50g Graphing Calculator - Manual (Page 801)

Page B-3
Main key functions
Keys A through F keys are associated with the soft menu options that
appear at the bottom of the calculator’s display. Thus, these keys will activate a
variety of functions that change according to the active menu.
The arrow keys, —˜š™, are used to move one character at a time
in the direction of the key pressed (i.e., up, down, left, or right).
The APPS function activates the applications menu.
The MODE function activates the calculator’s modes menu.
The TOOL function activates a menu of tools useful for handling variables
and getting help on the calculator.
The VAR function shows the variables stored in the active directory, the STO
function is used to store contents in variables.
The NXT function is used to see additional soft menu options or variables in
a directory.
The HIST function allows you access to the algebraic-mode history, i.e., the
collection of recent command entries in that mode.
The EVAL key is used to evaluate algebraic and numeric expressions, the
apostrophe key [ ‘ ] is used to enter a set of apostrophes for algebraic
expressions.
The SYMB activates the symbolic operations menu.
The delete key ƒ is used to delete characters in a line.
The y x key calculates the x power of y.
The key calculates the square root of a number.
The SIN, COS, and TAN keys calculate the sine, cosine, and tangent,
respectively, of a number.
The EEX key is used to enter power of tens (e.g., 5 × 10
3
, is entered as
5V3 , which is shown as 5E3).
The +/- key changes the sign of an entry, the X key enters the character X
(upper case).
The 1/x key calculates the inverse of a number, the keys +,
− , × , and ÷ , are
used for the fundamental arithmetic operations (addition, subtraction,
multiplication, and division, respectively).
The ALPHA key is combined with other keys to enter alphabetic characters.
x